Extracted from following patch of gpsbabel:
https://github.com/gpsbabel/gpsbabel/commit/604178aa8ad4d3c3ad218df24c1e9a6a1f683bb3

From 604178aa8ad4d3c3ad218df24c1e9a6a1f683bb3 Mon Sep 17 00:00:00 2001
From: Harel Mazor <harel.mazor@gmail.com>
Date: Tue, 24 Jan 2017 00:35:04 +0200
Subject: [PATCH] Added geojson read capablity, moved magic strings to
 constants, fixed windows compilation issues.

--- a/tef_xml.cc
+++ b/tef_xml.cc
@@ -72,11 +72,11 @@ tef_start(xg_string args, const QXmlStreamAttributes* attrv)
   bool valid = false;
 
   foreach(QXmlStreamAttribute attr, *attrv) {
-    if (attr.name().compare("Comment", Qt::CaseInsensitive) == 0) {
-      if (attr.value().compare("TourExchangeFormat", Qt::CaseInsensitive) == 0) {
+    if (attr.name().compare(QString("Comment"), Qt::CaseInsensitive) == 0) {
+      if (attr.value().compare(QString("TourExchangeFormat"), Qt::CaseInsensitive) == 0) {
         valid = true;
       }
-    } </td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=6b86c1f3db7cf813910cb5d7b2bc5acf33a55910'>refs</a><a href='/guix/log/'>log</a><a href='/guix/tree/?id=6b86c1f3db7cf813910cb5d7b2bc5acf33a55910'>tree</a><a href='/guix/commit/?id=6b86c1f3db7cf813910cb5d7b2bc5acf33a55910'>commit</a><a class='active' href='/guix/diff/?id=6b86c1f3db7cf813910cb5d7b2bc5acf33a55910'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/'>
<input type='hidden' name='id' value='6b86c1f3db7cf813910cb5d7b2bc5acf33a55910'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='6b86c1f3db7cf813910cb5d7b2bc5acf33a55910'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/guix/diff/?id=6b86c1f3db7cf813910cb5d7b2bc5acf33a55910'>Diffstat</a></div><table summary='diffstat' class='diffstat'>othing for the moment */
     }
   }
-- 
2.16.1